Periodic Table Crossword

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Across
  1. 2. The main element found in all living things
  2. 7. A gas that humans and animals need to breathe
  3. 9. Given the nickname "lazy" because it doesn't easily react to other elements
  4. 10. Has the nickname "Devil's Element"
  5. 13. This element doesn’t rust and is used in airplanes and soda cans
  6. 14. The most reactive of all the chemical elements
  7. 15. Comes from the Greek word neos, meaning "new"
  8. 16. This element has the atomic number of 14
  9. 17. A metal that reacts violently with water
  10. 19. A metal that burns with a bright white light
  11. 20. This element has the atomic mass of 9.01218
Down
  1. 1. An element used to make strong detergents
  2. 3. The basis for bleach
  3. 4. The universe's lightest element
  4. 5. A gas that changes your voice to a higher pitch
  5. 6. The lightest metal that can float on water
  6. 8. Important for muscles and nerves
  7. 11. Necessary for bone formation and strength
  8. 12. Used to preserve food
  9. 18. The 10th most common element in the universe